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The 23-year-old Perez becomes the latest pitcher to need the operation known as Tommy John Surgery. Typical recovery time is 12-18 months.

NL Rookie of the Year Jose Fernandez had the surgery Friday.

Perez is 4-3 with a 4.38 ERA. He threw consecutive shutouts on April 18 and 23, throwing 109 pitches in each start, to improve to 4-0 with a 1.42 ERA. In three starts afterward, he went 0-3 and allowed 19 earned runs in 13 1-3 innings. He pitched only 3 2-3 innings in his final start before coming out with pain.

The Rangers' rookie of the year last season, Perez became a permanent member of the starting rotation in late June and went 10-6 in 20 starts a 3.62 ERA.

Perez is Texas' second starter to be lost for the season during the past week. Left-hander Matt Harrison left a start on Tuesday after only 1 2-3 innings and was diagnosed with a back condition that could end his career.